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The Webmention plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 5.6.2 via the 'Tools::read' function. This makes it possible for authenticated attackers, with Subscriber-level access and above, to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Webmention Plugin | — | Update webmention plugin to version 5.7.0, or a newer patched version | Apr 30, 2026 | Apr 1, 2026 |
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